Results 51 to 60 of about 9,578 (228)

Review of Research on the Properties and Resource Utilization of Coal Gangue Concrete

Kuangchan zonghe liyong, 2023
Coal gangue is a by-product of the production of coal-associated minerals, and belongs to bulk solid waste material. coal gangue concrete is an important practice for its resource utilization.
Yousheng Deng, Ailin Feng, Liqing Meng, Long Li, Mengyu Zhang, Yunfang Zheng   +5 more
doaj   +1 more source

Critical Appraisal of Coal Gangue and Activated Coal Gangue for Sustainable Engineering Applications

Applied Sciences
Coal gangue, a primary solid waste by-product of coal mining and processing, constitutes approximately 10–15% of total coal output. Its accumulation poses substantial environmental challenges, including land occupation, spontaneous combustion, acid mine drainage, and heavy metal leaching. Despite its high silica and alumina content (typically exceeding
Narlagiri Snehasree, Mohammad Nuruddin, Arif Ali Baig Moghal   +2 more
openaire   +1 more source

Study on the Energy Evolution and Stability of Roadway Surrounding Rock Under the “Simultaneous Mining–Driving” Condition

Energy Science &Engineering, EarlyView.
Based on theoretical analysis, the energy‐evolution behavior of the surrounding rock at various depths on the solid‐coal side of the 221303 material roadway during the “advancing‐toward‐mining” process was first clarified. Numerical simulations were then performed to validate and elaborate on the theoretical results.
Wei Zhang, Peilin Gong, Kang Yi, Guang Wen, Libin Bai, Lizhu Liu, Chen Gong, Peng Li   +7 more
wiley   +1 more source

Design of automatic identification system of coal and gangue for fully-mechanized coal caving working face and its applicatio

Gong-kuang zidonghua, 2014
An automatic identification system of coal and gangue for fullly-mechanized coal caving working face based on vibration signal was proposed, structure and working principle of the system were introduced and design schemes of software and hardware of coal
ZHANG Liang, NIU Jianfeng, DAI Gang, ZHAO Wensheng   +3 more
doaj   +1 more source

A comparative study on the mineralogy, chemical speciation, and combustion behavior of toxic elements of coal beneficiation products [PDF]

, 2018
The huge demand for high-quality coal in China has resulted in increased generation of preparation plant wastes of various properties. A series of beneficiation products collected from a preparation plant were characterized to understand their ...
Fu, B(Fu, Biao), Hu, GQ(Hu, Guangqing), James C. Hower, Liu, GJ(Liu, Guijian), Liu, Guijian, Sun, M(Sun, Mei), Wu, D(Wu, Dun)   +6 more
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Cements based on kaolinite waste [PDF]

, 2018
The cement industry involves high-energy consumption that generates high CO2 emissions into the atmosphere. Environmental concerns can be addressed by replacing parts of Portland cement clinkers with pozzolanic materials in mortars and concrete.
Fernández Carrasco, Lucía, Frías, Moises, García Giménez, Rosario, Martínez Ramírez, Sagrario, Vegas Ramiro, Iñigo, Vigil de la Villa Mencía, Raquel   +5 more
core   +8 more sources

Stress Redistribution Mechanisms and Subsidence Control of Fluidized Gangue Backfilling in Underground Coal Mining: Integrated Experimental and Numerical Investigation

Energy Science &Engineering, EarlyView.
Fluidized gangue backfilling controls mining subsidence through stress redistribution in composite backfill‐pillar systems, reducing surface settlement and stress concentrations. Multi‐scale experimental and numerical analysis provides quantitative design parameters for optimizing ground control in sustainable underground coal mining operations ...
Weilong Zhang, Jie Zhang, Yuanzhen Zhang, Wenjing Liu, Liang Li, Deyi Nan, Guannan Zhao, Chen Yang, Haiqing Bian, Hua Shao, Xiao Zuo, Changtai Zhou   +11 more
wiley   +1 more source

Technology and engineering test of filling goaf with coal gangue slurry

Scientific Reports, 2023
Based on the greening and low interference disposal requirements of coal gangue in high-yield and high-efficiency mines in Inner Mongolia and Shaanxi, and by integrating the existing theories and technologies such as underground filling technology of ...
Shengrong Xie, Hao Pan, Wenzhe Gu, Lei Zhu, Dong Yue, Dongdong Chen, Tianqi Song, Zaisheng Jiang   +7 more
doaj   +1 more source

Effects of Fine Gangue on Strength, Resistivity, and Microscopic Properties of Cemented Coal Gangue Backfill for Coal Mining [PDF]

Shock and Vibration, 2015
The cemented coal gangue backfill (CGB) in coal mining is normally made of gangue (particle size of 0–15 mm), fly ash, cement, and water. In this study, the effects of the weight content (ranging from 20% to 60%) of fine gangue (0–5 mm) on the microscopic characteristics, resistivity, and compressive strength of CGB were investigated at 3 d and 28 d ...
Tingye Qi, Guorui Feng, Yanrong Li, Yuxia Guo, Jun Guo, Yujiang Zhang   +5 more
openaire   +2 more sources

Recovering the lost gold of the developing world : bibliographic database [PDF]

, 1999
This report contains a library of 181 references, including abstracts, prepared for Project R 7120 "Recovering the lost gold of the developing world" funded by the UK' s Department for International Development (DFID) under the Knowledge and Research (
Evans, E.J., Mitchell, C.J.
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